Chapter title |
STED Imaging of Golgi Dynamics with Cer-SiR: A Two-Component, Photostable, High-Density Lipid Probe for Live Cells
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Chapter number | 6 |
Book title |
Super-Resolution Microscopy
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Published in |
Methods in molecular biology, January 2017
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DOI | 10.1007/978-1-4939-7265-4_6 |
Pubmed ID | |
Book ISBNs |
978-1-4939-7264-7, 978-1-4939-7265-4
|
Authors |
Roman S. Erdmann, Derek Toomre, Alanna Schepartz, Erdmann, Roman S., Toomre, Derek, Schepartz, Alanna |
Abstract |
Long time-lapse super-resolution imaging in live cells requires a labeling strategy that combines a bright, photostable fluorophore with a high-density localization probe. Lipids are ideal high-density localization probes, as they are >100 times more abundant than most membrane-bound proteins and simultaneously demark the boundaries of cellular organelles. Here, we describe Cer-SiR, a two-component, high-density lipid probe that is exceptionally photostable. Cer-SiR is generated in cells via a bioorthogonal reaction of two components: a ceramide lipid tagged with trans-cyclooctene (Cer-TCO) and a reactive, photostable Si-rhodamine dye (SiR-Tz). These components assemble within the Golgi apparatus of live cells to form Cer-SiR. Cer-SiR is benign to cellular function, localizes within the Golgi at a high density, and is sufficiently photostable to enable visualization of Golgi structure and dynamics by 3D confocal or long time-lapse STED microscopy. |
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